LYFUCESS Key Fob Replacement for Jeep Compass 2017–2023 - 433 MHz M3N-40821302, Includes Transponder & Battery

Replacement smart proximity key fob compatible with Jeep Compass models from 2017 through 2023 that uses FCC ID M3N-40821302 (433 MHz) and accepts dealer or locksmith programming.

This LYFUCESS key fob replacement is a fully tested aftermarket remote designed to match the button layout and frequency of many Jeep Compass smart-entry systems. It ships with an internal transponder chip and battery but arrives as an uncut metal key blade—professional cutting and programming at a dealer or certified locksmith are required. The shell is built from premium materials to withstand daily pocket and keyring wear, and the product is intended to be used when your original remote is lost, damaged, or no longer reliable.

How do I know this fob fits my Jeep Compass?

Confirming fit requires checking three things on your original remote: the FCC ID, the part number, and the frequency. This LYFUCESS unit matches FCC ID M3N-40821302 and transmits at 433 MHz, and is compatible with part numbers 68250346AB, 68250337AB, 68417821AA, and 68417821AB for many 2017–2023 Compass models.

• Match your original FCC ID to M3N-40821302 (or M3N40821302).
• Verify one of the listed part numbers on your existing remote or service paperwork.
• Confirm the vehicle uses 433 MHz remote frequency.

What setup and programming steps are required?

The supplied key blade is uncut and the remote is not pre-programmed to your vehicle. A professional locksmith or dealership must cut the key to your ignition and complete electronic programming to pair the transponder and remote functions to the car. LYFUCESS products are tested before shipping, but in-vehicle programming ensures secure operation.

• Have the metal blade cut to match your ignition by a locksmith or dealer.
• Take the new fob and vehicle to a locksmith or dealer for immobilizer/transponder programming.
• Retain your original remote until the replacement is fully confirmed working.

What features and build quality can I expect?

This aftermarket remote includes an internal chip and preinstalled battery so it’s ready to be programmed. The housing is manufactured from durable ABS and reinforced materials to resist daily wear; there are no manufacturer logos on the shell because it is not an OEM product. Each unit undergoes inspection to ensure the buttons, contacts, and radio module function before shipment.

• Includes transponder chip and installed battery for immediate programming readiness.
• Durable ABS housing and protected button design for long-term use.
• No OEM logos—aftermarket replacement intended for non-branded use.

What after-sales support is available if something goes wrong?

LYFUCESS offers a 90-day support window for replacement or refund if the remote proves defective. Customer service can help troubleshoot fit and function questions, but remember programming and cutting services are performed locally and may have additional costs. Keep order details and photos of your original key for faster assistance.

• 90-day window for a refund or replacement if quality issues arise.
• Customer support available to verify part numbers and FCC ID before purchase.
• Save your original remote information and purchase receipt for claims.

Who is this for: This LYFUCESS key fob replacement is aimed at Jeep Compass owners (2017–2023) who need a reliable aftermarket remote to replace a lost or damaged fob and are prepared to have a professional locksmith or dealer cut and program the unit. It’s also suitable for garages or auto shops that provide key cutting and programming services and want a tested, ready-to-program aftermarket option.